Drink mixer



Oct. 1, 1929. v P. H. ROBINSON ET AL 1,729,966

DRINK MIXER Filed. Oct. 15. 1926 2 Sheets-Sheet 1 Oct. 1, 1929. P. H. ROBINSON ET A1.

DRINK MIXER Filed Oct. 15. 1926 2 Sheets-Sheet 2 Patented a. 1, 1929 UNITED STATES PATENT: OFFICE PATRICK H. ROBINSON, EMANUEL NIELSEN, AND EDWARD R. MROSS, OF BACINE, WISCONSIN, ASSIGNORS TO HAMILTON BEACH MANUFACTURING COMPANY, OF RACINE, WISCONSIN, A. CORPORATION OF WISCONSIN DRINK MIXER Application filed October 15, 1926. Serial No. 141,698.

The invention relates to electric drink mixers, and more particularly to the automatic type in which manual placement of the receptacle into suitable retaining means and its re moval therefrom are all the operative steps to be performed in a mixing operation.

The objects of the invention are: to provide an improved construction in which a slidable switch-operating member is engaged by the rim of the receptacle to start and stop the motor; to provide a simple and efficient manner of'mounting the switch inside of the column, in which the switch parts are all assembled on a suitable strip prior to their insertion in the hollow supporting column to facilitate placement of the switch mechanism into the column; to utilize the securing de-v The invention conslsts in the several novel I features hereinafter setforth and more particularly defined by claims at the conclusion hereof. v v p In the drawings: Fig. 1 is a vertical section of a machine embodying the invention, parts being shown in elevation. Fig. 2 is a perspective of the switching device separated from the column. Fig. 3 is a longitudinal section of the switching device, the contacts being shown in the position assumed when the circuit is opened. Fig. 4 is a section on line 4-4 of Fig. 1. Fig. 5 is a section on line 55 of Fig. 1. Y Fig. 6 is a front elevation of the receptacle retaining hook.

The inventionis exemplified'in a mixer comprising a hollow supporting standard A which has integrally formed therewith a base a adapted to rest on a counter or other suitable support; an electric motor B mounted on an integral elbow at the upper end ofv the 50 column; a shaft 6 depending from the motorpositively shifte shaft and directly driven thereby; an a itator b fixed to the lower end of the sha t b; a receptacle E adapted to contain the con stituents of the drink to be mixed; and an automatic retaining device for the receptacle on the front of the column comprising a stud c to receive and serve as a support for the bottom of the receptacle E and a hook 0' adapted to enter the open top of the receptacle E and hold it on the stud. There is sufficient clearancebene ath and around the agitator'and its shaft to permit the receptacle itself to be manually manipulated from below into the retaining device and its operative position around the agitator. This retainin device holds the receptacle in its operative position when it has been thus shifted and'permits direct removal of the-receptacle by lowering it beneath the agitator. The-front of the column A is concave as at a to guide the unper margin of the'recep- "tacle in its manual placement into the retaining device.

In=th1s type ofmixer, the motoris automatlcally started by placement of .the receptacle into the retaining device and automatically stopped by its removal therefrom and it is desirable to rovide a switch which is by the receptacle and which will be held in position to close the motor circuit while the receptacle is in its operative position. The switch-structure is enclosed in the hollow supporting-standard and assembled and connected to the electrical conductors prior to its insertion in the-standard, so that it'will be readily and removably secured therein by the same screws or devices which secure the receptacle retaining hook and stud to the column.

The connections for supplying current to the motor comprise a conductor b, leading directly from anordinary switch plug (not shown) to the motor, and a conductor 6 in which the switch is included to control the operation of the motor. The entire switching mechanism is mounted upon and connected to a strip of metal D which has upper and lower forwardly offset ends or lugs d and d so that the central portion thereof will be spaced backwardly from the front strips and the slide.

wall a of the column A. The offset end or lug d has a screw-threaded opening to receive the screw 0 which (passes through book 0' so that the upper en of the strip may be securely supported in the colunm by said screw 0 which passes through the front wall of the column and clamps both the hookand said strip to the column. The lower lug or offset end d is also provided with a screw-threaded hole to receive the screw-threaded shank 0 of the retaining stud 0. Said shank is integral with the stud, passes through the front wall of column A and clamps the lower end of strip D and the stud to the column.

One branch of the conductor 6' is connected, usually soldered, as at b to a springcontact-strip b and the other branch of. the conductor 6 is similarly connected to a spring-contact-strip b which is separated from contact 6 to normally open the motorcircuit. Each of thesecontact-strips b 6' is secured by a rivet b to a strip of insulation 1). Rivets I) extend through the strip b". A strip of insulation 1) is interposed between strip 6 and the back-face of the supportingstrip D to insulate the rivets b from metal strip D. Additional rivets extend through supporting-strip D and insulating strips 6' and b to secure them all together. This provides a method of securing the contact-strips b and b to the supporting-strip D so the contacts will be effectively insulated from each other and from strip D. The circuit for the motor is adapted to be closed by a rivet or stud e which is adapted to bridge the gap between the terminals of the strips 12 and 6*. Stud e is riveted to a strip of insulation e against which the resilient terminals of strips 6 and b are adapted to bear, the front face of stud e being preferably flush with the front face of said strip. A strip of insulation e is interposed between the back of-the stud-carrying strip e and a slide F to which both of said strips are secured by rivets e" which pass through said The-strip e insulates the stud e from the slide. formed of a strip of metal which is bent to form a portion f fitting against the front face of the supporting strip D, a lower portion f also adapted to engage the strip D, and an intermediate offset portion f extending across the back of the insulating strips 6 and 6 Between the offset portion and the front portions, the strip is slotted, as at f and f so the strip D may be passed therethrough. The inclined strips f at the sides of the slots f and f unite the relatively offset portions of the slide and straddle the supporting strip D so that the slide will be confined transversely on said strip. A tongue 7" is struck backwardly from the portion f of strip 7 to form a hook to which is connected one end of a retracting spring g for the slide The other end of the spring is The slide F is connected to a screw 9' which extends through the supporting strip D and is provided with a head 9 at the front of said supporting strip. The side has a slot 9 the 11pper ends of which serve as a stop for the slide and the slot permits the slide to move a limited distance relativel to the supporting strip. The resiliency of the contact strips 6 b which engage the insulating strips 6 on the slide presses the slide rearwardly so that the portions f and f of the slide will be frictionally held against the front face of the supporting strip D. This also insures contacting engagement between the strips 6 and b and the bridging stud e. A strip of paper it in back of the switch structure has one of its ends secured by the rivet d to strip D and the branches of the conductor I) extend through perforations in the strip.

The upper end of slide f is bent forwardly, as at f" and extends through a hole a in the front wall of supporting-column A in back of the receptacle-retaining hook c. The forwardly projecting portion f of the slide extends into the path of the rim of the receptacle E and forms an abutment, which, when the rim is slipped upwardly along the standard, will operate the slide upwardly a sulficient distance to shift stud e which is movable therewith into position to bridge the gap between contact strips 6 and b and thus close the circuit to start the motor. When the receptacle is removed the spring 9 will retract the slide and shift the stud e so that it will open the circuit between the contacts 6 and b.

In manufacturing the mixers, the entire switching unit with the conductor-connections made is assembled on the supporting strip D before it is inserted from below into the column A. The lower end of said column is open for that purpose. The assembled structure with the branches of conductors b secured to the contacts 6 b are lifted in the column so the threaded holes in lugs 03 and d of the strip D register with the screws 0 and c of the retaining hook and retaining stud respectively. The entire structure will be properly mounted and secured therein by turning the inner ends of said screws into the strip D and clamping it to the back face of the front wall of the column. If at any time, the switch should become defective or is to be replaced, the entire switching unit may be readily removed by loosening the screws 0 and 0 Thus this construction makes it possible to quickly repair any de fect therein, and also to quickly replace the unit, if desired. The hook c is of sufiicient width to conceal the opening a and cover it so that none of the contents of the receptacle will be splashed into the column through said opening.

The invention exemplifies an electric drink mixer of the type in which placement and the I removal of the receptacle are all that are necessary in a mixing operation, in which the switchin structure may beassembled and inserted mtothe supporting column, and secured therein by the retaining "device or screws of the receptacle holder; in which a slide is engaged by the upper rim of the re- 7 ceptacle in transit to its position to be held b a stationary retaining hook so that the switc will be positively operated; and in which the switching mechanism is simple in construction andeflicient in operation and may be produced at a low cost."

The invention is notto be understood as restricted to the-details set'forth, since these a may be modified within the scope of the ap pended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to'secure by Let ters Patent, is:

I 1. In a machine of the character described,

the combination of a hollow supporting column, an electric motor mounted at the u per end of the column, a shaft provided wit an agitator and driven by the motor, means to .retain a receptacle in operative position beneath the motor. upon manual manipulation of the receptacle itself into such position,

comprising stationary elements to engage the upper and lower portions of the receptacle, a switch connected to control the operation of the motor, and a switch-operating slide in the column, said slide being engageable and movable upwardly by the rim of the receptacle, in manipulation of the latter into operative position, to close automatically the switch.

2. In a machine of the character described, the combination of a hollow supporting col umn, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means to retain a receptacle in operative position beneath the'motor upon manual manipulation of the receptacle itself to such position, comprising a bottom support, a switchconnected to' control the operation of the motor, a

switchsoperating slide in the column, said comprising elements to engage the upper and lower portions of the receptacle, a switch conretain the receptacle in operative position I the receptacle, 1n manipu ation of the latter nectedto control the operation of the motor,

mounted in the column, and a vertically movable switch-operating slide in the column and engageable by the 'upper rim of the receptacle, in manipulation of the latter intooperative position, to close automatically the switch.

4. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the u per end of the column, a'shaft provided wit an agitator and driven by the motor, means to beneath the motor upon manual manipulation of the receptacle itself into such position, comprising a bottom support, a switch connected to control the operation of the mo-; tor, mounted in the column,'a vertically movable switch-operatin member engageable and movable upwardfi b the upper rim of n n u o o into 0 rative pos tion, to close automatlcally tie switch, and spring means to press the slide against said rim and the receptacle against the bottom support.

5. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the u per end of the column, a shaft provided wit an agitator and driven by the motor, means for retaining the receptacle in operative position 5 beneath the motor upon manual manipula- I tion of the receptacle itself into such position, comprising an element adjacent the column, a switch connected to control the operation of the motor in the column, a movable switch-operating memberin the column and engageable by the rim of the receptacle, a supporting strip in the column for the switch and said member, and means for conjointly securing said element and said strip to the 1% column.

6. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means for retaining the receptacle in operative position beneath the motor upon manual mani ulation of thereceptacle itself into such position, comprising a plurality of elements on the 1 5 column to engage the upper and lower por-. tions of the receptacle, a switch connected to control the operation of the motor, in the column, a switch-shifting member in the column and engageable by the rim of the re- :20 ceptacle, a supporting strip in the column for the switch and said member, and devicesv for conjointly securing the elements and said strip to the column.

7. In a machine of the character described, the-combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means for retaining the receptacle in operative posiumn, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven b the motor, means for retaining the receptac e in operative position beneath the motor upon manual manipulation of the receptacle itself into such position, comprising a hook and a stud on the front adjacent the column to engage the upper and lower portions of the rece tacle respectively, a switch for controlling t e operation of the motor, in the column, a supporting strip in the column, for the switch, and screws or conjointly securing the strip and the hook and stud to the column.

9. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven b the motor, means for retaining the receptac e in operative position beneath the motor upon manual manipulation of the receptacle itself into such position, comprising a hook and a stud adjacent the front of the column to engage the upper and lower portions of the receptacle respectively, a switch for controlling-the operation of the motor, in the column, a supporting strip in the column, for the switch, a switchoperating member operable by the receptacle and mounted on said strip, and screws for conjointly securing the strip and. the hook and stud to the column.

10. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means for retaining the receptacle in operative position beneath the motor upon manual manipulation of the rece tacle itself into such position, comprising a ottom support, a switch for controlling the operation of the motor, in the column, a switch-operating member in the column and engageable by the rim of the receptacle, and a supporting strip by which the switch and member are carried, the strip, switch and member being unitarily insertable into and removable from the column.

11. In a machine of the character described, the combination of a hollow support ing column, an electric motor mounted at the with an agitator and driven by the motor, means for retaining the receptacle in operative position beneath the motor upon manual manipulation of the receptacle itself into such position, comprising stationary elements to engage the upper and lower portions of the receptacle, a switch for controlling the operation of the motor, in the column, a switch-operatin member in the column and engageable by t e rim of the receptacle, and a supporting strip by which the switch and member are carried, the strip, switch and member being unitarilyinsertable into and removable from the column.

12. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means for retaining the receptacle in operative position beneath the motor upon manual manipulation of the receptacle itself into such position, a switch for controlling the operation of the motor, in the column, a vertically movable switch-operating slide engageable by the rim of the receptacle, and a supporting strip bywhich the switch and member are carried, the strip, switch and slide being unitarily insertable into and movable from the column.

13. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by, the motor,

scribed, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by the motor, means for retaining the receptacle inoperative position beneath the motor upon manual manipulation of the receptacle itself into such position, a switch for controlling the operation of the motor comprising contacts,

a supporting strip in the column on which one of the switch-contacts is mounted, and a slide, guided by sai-dsupporting strip, carrying another contact, having portions extending to the opposite sides of the strip, and provided with means engageable by the receptacle to shift the last mentioned contact to upper end of the column, a shaft provided open and close the switch.

Cit

15. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the upper end of the column, a shaft provided with an agitator and driven by. the motor, means for retaining the receptacle in operative position beneath the motor upon manual manipula-' tion of the receptacle itself into such position, a switch connected to control the operation of the motor, comprising a pair of contact stripsand a bridging contact, a supporting strip, in the column, to which the contact strips are secured, and a slide carrying the bridging contact, guided by said supporting strip mounted on the strip, and provided with -means engageable by the receptacle to shift the motor comprising a pair of contact strips and a bridging contact, a supporting-strip, in the column, to which the contact strips are secured, and a slide carrying the bridging contact and having an opening therein through which the strip extends to guide the slide, and

provided with means engageable by the re ceptacle to shift the bridging contact to open and close the switch.

17. In a machine of the character described,

the combination of a hollow supporting column, an electric motor mounted at theupper end of the column, a shaft provided with an agitator and driven b the motor, means for retaining the receptac e in operative position beneath the motor upon manual manipulation of the receptacle itself into such position, a switch for controlling the operation of the motor, in the column and comprising a pair of resilient contact strips and a bridge-contact, a supporting strip in the column, to which the contact strips are secured, and a slide guided by said supporting strip, carrying the bridging-contact, and provided with a art extending. through the front of the co umn and engageable by the receptacle to shift the bridge-contact to open and close the switch.

18. In a machine of the character described, the combination of a hollow supporting column, an electric motor mounted at the u per end of the column, a shaft provided wit an agitator and driven by the motor, means for retaining the receptacle in operative position beneath the motor upon manual manipulation of the receptacle itself into such osition, a switch for controlling the operation of the motor, in the column and comprising a pair of resilient contact strips and a bridge-contact, a supporting strip on which the contactstrips are mounted, extending vertically in the column and having forwardly offset ends, and a slide mounted on the strip, carrying the bridge-contact, and provided with a part engageable by the receptacle to shift the bridgecontact to open and close the switch.

Signed at Racine, Wisconsin, this 7th day of October, 1926.

PATRICK H. ROBINSON. EDWARD R. MROSS. EMANUEL NIELSEN. 

